Initial opendaylight infrastructure commit!!

[controller.git] / third-party / net.sf.jung2 / src / main / java / edu / uci / ics / jung / algorithms / layout / PolarPoint.java

diff --git a/third-party/net.sf.jung2/src/main/java/edu/uci/ics/jung/algorithms/layout/PolarPoint.java b/third-party/net.sf.jung2/src/main/java/edu/uci/ics/jung/algorithms/layout/PolarPoint.java
new file mode 100644 (file)
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+++ b/third-party/net.sf.jung2/src/main/java/edu/uci/ics/jung/algorithms/layout/PolarPoint.java
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+/*
+* Copyright (c) 2003, the JUNG Project and the Regents of the University 
+* of California
+* All rights reserved.
+*
+* This software is open-source under the BSD license; see either
+* "license.txt" or
+* http://jung.sourceforge.net/license.txt for a description.
+*/
+package edu.uci.ics.jung.algorithms.layout;
+
+import java.awt.geom.Point2D;
+
+/**
+ * Represents a point in polar coordinates: distance and angle from the origin.
+ * Includes conversions between polar and Cartesian
+ * coordinates (Point2D).
+ * 
+ * @author Tom Nelson - tomnelson@dev.java.net
+ */
+public class PolarPoint 
+{
+       double theta;
+       double radius;
+       
+       /**
+        * Creates a new instance with radius and angle each 0.
+        */
+       public PolarPoint() {
+               this(0,0);
+       }
+
+       /**
+        * Creates a new instance with radius {@code radius} and angle {@code theta}.
+        */
+       public PolarPoint(double theta, double radius) {
+               this.theta = theta;
+               this.radius = radius;
+       }
+       
+       /**
+        * Returns the angle for this point.
+        */
+       public double getTheta() { return theta; }
+
+       /**
+        * Returns the radius for this point.
+        */
+       public double getRadius() { return radius; }
+       
+       /**
+        * Sets the angle for this point to {@code theta}.
+        */
+       public void setTheta(double theta) { this.theta = theta; }
+       
+       /**
+        * Sets the radius for this point to {@code theta}.
+        */
+       public void setRadius(double radius) { this.radius = radius; }
+
+       /**
+        * Returns the result of converting <code>polar</code> to Cartesian coordinates.
+        */
+       public static Point2D polarToCartesian(PolarPoint polar) {
+               return polarToCartesian(polar.getTheta(), polar.getRadius());
+       }
+
+       /**
+        * Returns the result of converting <code>(theta, radius)</code> to Cartesian coordinates.
+        */
+       public static Point2D polarToCartesian(double theta, double radius) {
+               return new Point2D.Double(radius*Math.cos(theta), radius*Math.sin(theta));
+       }
+
+       /**
+        * Returns the result of converting <code>point</code> to polar coordinates.
+        */
+       public static PolarPoint cartesianToPolar(Point2D point) {
+               return cartesianToPolar(point.getX(), point.getY());
+       }
+
+       /**
+        * Returns the result of converting <code>(x, y)</code> to polar coordinates.
+        */
+       public static PolarPoint cartesianToPolar(double x, double y) {
+               double theta = Math.atan2(y,x);
+               double radius = Math.sqrt(x*x+y*y);
+               return new PolarPoint(theta, radius);
+       }
+       
+       @Override
+       public String toString() {
+           return "PolarPoint[" + radius + "," + theta +"]";
+       }
+       
+       /**
+        * Sets the angle and radius of this point to those of {@code p}.
+        */
+       public void setLocation(PolarPoint p) {
+               this.theta = p.getTheta();
+               this.radius = p.getRadius();
+       }
+}
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